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17 Cards in this Set
- Front
- Back
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What’s the approximate percentage of oxygen in the atmosphere? |
21% |
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What’s the mass of air? |
1.2kg/m2 |
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What is the pressure lapse rate in ISA conditions? |
Up to 10,000ft MSL, approx 34hPa (1inHg) per 1,000ft of altitude.That is approx 30ft per 1 hPa, or 3.5hPa per 100ft |
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What is the dry adiabatic lapse rate? (DALR) |
Approx 3°C per 1,000ft of altitude. |
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What is the saturated adiabatic lapse rate? (SALR) |
At lower latitudes and lower altitudes, ca 1.5°C per 1,000ft of altitude.At higher latitudes and higher altitudes, ca 3°C per 1,000ft of altitude. |
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From what to what distance is the visibility condition referred to as mist or haze? |
>= 1km and < 8km of visibility |
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When is it mist and when is it haze? |
Beside the >= 1km and < 8km: - Mist: relative humidity >= 80% (fyi, spread is 3°C) - Haze: relative humidity < 80% |
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How fast do warm fronts travel? |
10 - 15kt |
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How fast do cold fronts move? |
25-30kt |
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Name the relation between humidity, temperature and pressure? When humidity changes by n%, then… |
1% humidity change, temperature change 3deg C, pressure change of 10hPa |
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What are the conditions required for CAVOK? |
- visibility 10km or more - no clouds below 5000ft AGL or below the highest minimum sector altitude - no CB, no TCU - no weather phenomena |
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How much variation in TAS do you expect with light turbulence? |
5 to 15kt |
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How much variation in TAS do you expect with moderate turbulence? |
15 to 25kt |
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How much variation in TAS do you expect with severe turbulence? |
more than 25kt |
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How high can you be subjected to friction turbulence? |
ca 3000ft AGL (friction layer) |
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How fast can convective turbulence become? |
normally between 2m/s and 5m/s, but 10m/s is possible in summer |
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For which altitude range are wind shear warnings issued? |
runway elevation up to 1600ft AGL |
